Extruded channel plate as basis for integrated functions

ABSTRACT

The invention provides a multi-channel plate (100) comprising (i) a plurality of parallel arranged channels (1) and (ii) at least a light source (10) configured to provide light source light (11), wherein a first channel (110) includes a light transmissive part (12), wherein the light source (10) is configured to provide light source light (11) downstream from the light transmissive part (12) and external from the first channel (110) as a first lighting function, and wherein the multi-channel plate (100) includes a second channel (120), configured to provide an additional function different from said first lighting function.

CROSS-REFERENCE TO PRIOR APPLICATIONS

This application is the U.S. National Phase application under 35 U.S.C.§ 371 of International Application No. PCT/EP2015/070307, filed Sep. 6,2015 which claims the benefit of EP Patent Application No. 14183874.8,filed on Sep. 8, 2014. These applications are hereby incorporated byreference herein.

FIELD OF THE INVENTION

The invention relates to a multi-channel plate, to a luminaire includingsuch multi-channel plate, and to a horticulture construction comprisingsuch multi-channel plate. The invention further relates to a kit ofparts including such multi-channel plate, as well as to a method forproducing such multi-channel plate. The invention also relates to amethod for installing such multi-channel plates.

BACKGROUND OF THE INVENTION

Modular lighting systems are known in the art. WO2013050913, forinstance, describes a lighting system comprising a plurality of modules,the modules respectively comprising: a housing provided with an exitwindow; at least one light source provided in the housing; wherein thelighting system further comprises: a controller arranged to drive lightsource(s); an electrical circuit arranged to connect light source(s)with the controller, the electrical circuit further comprising a firstpair of electrical contacts provided in a first module and a second pairof electrical contacts provided in a second module, the first and secondpair of contacts being arranged for a mutual electrical connection.

SUMMARY OF THE INVENTION

Luminaires or lighting modules in e.g. offices may be relative bulky andmay be relative complicated to produce. Often the components used arethick and thus imply high material costs for different reasons, such asto prevent sagging, and/or to make the luminaire waterproof, and/or tomake the luminaire impact resistant. To change functions,specifications, appearances, etc., the whole design nowadays has to beadjusted, involving multiple components.

Hence, it is an aspect of the invention to provide an alternativelighting module, which preferably further at least partly obviates oneor more of above-described drawbacks, and which may especially easily beproduced and which may occupy less space than state of the artluminaires or lighting modules.

In the prior art there is no integration of lighting functions(luminaires, light giving components) with other (non-lighting)functions like construction elements, water (liquid) tubing/plumbing,and electrical tubing/pipes. Luminaires are only used for lighting.Thus, there is no usage of concepts that reaps the benefits ofintegrating these functions like lower total cost and addedfunctionalities/possibilities.

The present inventive concept is especially based on the integration oftwo or more functions in single (lighting) modules, which modules mayoptionally be coupled to each other, and which modules are especiallybased on single extruded (hollow) bodies, especially polymer bodies. Inthis way space may be used efficiently, materials may be usedefficiently, and different functionalities can be combined within asingle module. It may even be possible for the end user to choose thedesired functionalities. Further, the present invention also providesthe possibility to use modules as building elements in e.g. a house, anoffice, a plant, a hospitality area, etc., or for specific applications,such as horticulture applications, etc . . .

In a first aspect, the invention provides a multi-channel platecomprising (i) at least one first and at least one second parallelarranged channel and (ii) at least a light source configured to providelight source light to said at least first channel, which includes alight transmissive part and is configured to provide as a first lightingfunction said light source light downstream from the light transmissivepart and to the exterior from said multi-channel plate, and wherein saidat least one second channel is configured to provide an additionalfunction different from said first lighting function.

These multi-channel plates are also referred to as multi-wall sheets,wherein the channels are referred to as cavities separated from eachother by ribs, said ribs being the walls transverse to the main surfacesof the plate. The additional functions are attained by providing themulti-channel plate with additional elements/parts which enable and/orperform said additional function. The expression “multi-channel plate”in this context means that said plate has cross-sectional size, parallelto the main surfaces of the plate and transverse to the length of thefirst channel, of at least three times the cross section of the channelof the first and second channels having the largest cross section asmeasured parallel to the main surfaces of the multi-channel plate.

As indicated above, with such module one may integrate a lightingfunctionality with one or more other functionalities. For instance, themodule may be used as building element. The module may also be used forthermal isolation. Additionally or alternatively, one or more secondchannels may be used to transport a fluid like air or water, which mayoptionally be used for heating or cooling e.g. a room adjacent to themodule, or e.g. for irrigation. Additionally or alternatively, one ormore second channels may be used for cables, like for ICT applicationsand/or for the light source, and/or may be used for sensors. Further,such one or more second channels may also be used for mechanicalreasons, e.g. to bridge spaces and/or to introduce strength to a module,which may span a substantial area.

Especially, the module includes a multi-channel body which is especiallyobtainable by extrusion. Specific examples thereof are described inWO2013008179, which is incorporated herein by reference. For instance,the body may include a multiwall sheet, comprising walls, wherein thewalls include a first wall, a second wall, and a transverse wall,wherein the first wall, the second wall, and the transverse wall extendlongitudinally, and (optionally) a rib extending between adjacent walls.Hence, in a specific embodiment the first channel and second channel arepart of a single polymer body. However, the invention is not limited tothe embodiments described in WO2013008179.

Herein, the term “first channel” and “second channel” may also refer toa plurality of such channels. Hence, especially the multi-channel plateincludes at least n parallel arranged channels, with n being an integerof at least 3, wherein the multi-channel plate includes n-1 or lessfirst channels (but at least one first channel). Any first channel has alighting function, and one or more second channels, especially anysecond channel, may in embodiments have no lighting functionality (seealso below). The second channel(s) may have other functionalities, asindicated above. The term “lighting function” or “lightingfunctionality” indicates that from the first channel light source lightmay escape. The functionality of the channel(s) may optionally also bechosen by a user (including an installer). In this way, a module isprovided that integrates functionalities and may occupy less space thanwhen those functionalities would be provided with state of the artsolutions. For instance, with the present invention ceiling systems mayoccupy less (vertical space) as the multi-channel plates may be used asceiling system panels. The term “no lighting functionality” may at leastindicate that the channel does not enclose a light source, but yet maybe used for redistribution, redirection, modification and/ortransportation of light source light.

The first lighting function provided by the at least one first channelmay be attained by providing at least one light source, for example amulti-LED strip inside and essentially over the full length of saidfirst channel. In an alternative embodiment said first lighting functionmay be attained by providing light sources, for example a LED lightsource or a laser diode at an opening at one end or at both ends of saidfirst channel. In said alternative embodiment light source lightgenerated by said light source is transported through the channel, forexample by a solid, optionally patterned, light guide and subsequentlyhomogeneously is coupled out of said first channel over the length ofsaid first channel. Said homogeneous outcoupling may be attained by aspecific scattering, refractive, diffractive or luminescent pattern onthe light guide. Optionally the pattern is provided with a gradient orprovided on specific sides of a light guide to couple light out into apreferred direction, for example in a direction perpendicular to thewalls between adjacent channels, thus to further improve the homogeneityof light emitted through adjacent channels of the multi-channel plate.Further alternatively, a single light guide may be woven into themulti-channel plate through number of first channels, or a number oflight guides may be used for that purpose.

In yet a further embodiment, the multi-channel plate comprises arepetitive structure of first channels having a first lightingfunctionality and second channels having at least one additionalfunction different from said first lighting function, for example inthat the second channels do not include light sources, or provide asecond lighting function, for example emergency lighting of much lowerbrightness/light level than the brightness/light level of light providedby the first lighting function. With a repetitive structure, homogeneouslighting may be provided more easily. However, when there are more thantwo channels it is not necessary that there is a repetitive structure(of first and/or second channels). However, when there are more thanabout 8 channels, especially there may be a regular arrangement of firstchannels (e.g. channels 2, 4, 6 and 8 equipped with light sources). Thenumber of first channels is not necessarily equal to the number ofsecond channels (see also above). The term “parallel arranged channels”indicates that the channels are arranged in a parallel manner.Especially channel axes of such channels are aligned parallel.

The term “channel” especially refers to a structure which at leastpartly encloses an elongated cavity, such as a tubular passage or ductfor e.g. a liquid. The channels herein may have a circularcross-section, but may also have other cross-sections, like square ortriangular or hexagonal. Another term for the “multi-channel plate” mayalso be a “multi wall plate” or “multi-wall sheet”, etc . . . One ormore channels of the multi-channel plate may be open at the ends, butone or more channels may also be closed at one or both ends. Further,one or more channels, especially at the faces of the plate may haveopenings, optionally longitudinal openings, optionally over the entirelength of the channel. The channels especially have lengths that aresubstantially larger than their width/height/diameter, such at least a10 times larger length than one or more other dimensions selected from awidth, a height, a diameter. Especially, the channels are closed overtheir entire length, i.e. the channel wall(s) circumvent the channelcavity. The term “circumvent” does not necessarily refer to a roundcircumvention. The channels of the multi-channel plate are especiallyarranged parallel. Hence, channel axes are especially aligned parallel.In addition, however, one or more channels may include openings in thewalls (that are configured parallel to the channel axes), especiallywalls at a front face. In this way, e.g. fluid may escape throughorifices (see also below).

The multi-channel plate is not necessarily flat. The multi-channel platemay be curved and/or may have curved surfaces. Further, themulti-channel plate may include indentations and/or protruding parts.Indentations may e.g. be used to protect parts, e.g. transmissive partsor nozzles (see also below). The overall feature of the multi-channelplate is however plate like, i.e. a height and a width that are eachsmaller than a length of the multi-channel plate, with the width beingsignificant larger, for example at least 4 times, the height of theplate. Especially the length of the multi-channel plate is at least 10times the width and/or height of the multi-channel plate. Optionally,the one or more channels may have different lengths; this may e.g. beused for coupling multi-channel plates to each other or for otherfunctionalities.

The term multi-channel plate or multi-wall sheet may also refer to amulti-channel plate including layers of channels. Hence, themulti-channel plate may include an arrangement of multiple channels(parallel) in 1D, but may optionally also include an arrangement ofmultiple channels in 2D. Also in the latter embodiment, the channelswill especially be arranged parallel. Also the layers will especially bearranged parallel.

The channels of the multi-channel plate do not necessarily have the samecross-section. The cross-sections may differ in geometry (see alsoabove), but even channels having the same geometrical cross-sectionshape may differ in circumferential length. Hence, though the channelswill in general have substantially the same length (i.e. substantiallythe same length as the multi-channel plate), but the cavity dimensions(i.e. width/height/diameter of the channel) may differ. By way ofexample, the multi-channel plate may include three channels, with twohaving a square cross-section, and arranged adjacent, and a furtherchannel having a cross-section substantially twice the squarecross-section (i.e. rectangular), and arranged on top (or below) the twochannels. All kind of arrangements (that is physically allowable) arepossible.

The thickness of the walls may vary over the length and/or width and/orheight of the multi-channel plate. For instance, part of the ends of themulti-channel plate may be thicker than the part in between the ends. Inthis way, e.g. a light weight multi-channel plate may be provided. Forinstance, the process may include using an adjustable extrusion mold, tovary dimensions of the multi-channel plate over its length.

The multi-channel plate may include a light transmissive part;especially first channel may include a light transmissive part. The term“light transmissive part” may optionally refer to an opening, i.e. awindow without material, but especially refers to a window includingsolid material but being transmissive for light source light. The lighttransmissive part may especially be transmissive for at least part ofthe light source light.

As extrusion may also be performed with more than one component, thecomposition of the material of the multi-channel plate, i.e. of thewalls (the body) may vary dependent upon the position at themulti-channel plate. Therefore, the term “extrusion” and similar termsmay also refer to co-extrusion, etc . . .

Hence, optionally parts of the multi-channel plate may include lighttransmissive material whereas other parts may include non-transmissivematerial. Hence, the multi-channel plate, especially the body, includesa light transmissive polymer body. Hence, the walls may in embodimentsinclude light transmissive polymer material. For transmissive polymericmaterials one or more materials may be selected from the groupconsisting of e.g. PE (polyethylene), PP (polypropylene), PEN(polyethylene naphthalate), PC (polycarbonate), polymethylacrylate(PMA), polymethylmethacrylate (PMMA) (Plexiglas or Perspex), celluloseacetate butyrate (CAB), silicone, polyvinylchloride (PVC), polyethyleneterephthalate (PET), (PETG) (glycol modified polyethyleneterephthalate), PDMS (polydimethylsiloxane), and COC (cyclo olefincopolymer).

The term “transmissive” may refer to “transparent” or “translucent”. Ifdesired, translucency may be introduced by the specific (polymer)starting material used and/or may be provided after extrusion, such asby sand-blasting or other methods known in the art.

Alternatively, the body may include another material than polymer. Forinstance, the body may also include a glass material. Hence, in anembodiment the multi-channel plate includes glass walls.

Further, optionally at least part of the multi-channel plate may includea luminescent material, especially one or more walls of the firstchannel. In combination with the light source, the luminescent materialcan wavelength convert at least part of the light source light. Forinstance, the light source may include a blue LED and the luminescentmaterial may include a wavelength converter configured to convert atleast part of the blue light into one or more of green, yellow, orangeand red light. For instance, the luminescent material in combinationwith the light source may provide white light (which may optionally alsobe color tunable by controlling the intensity of the light of the lightsource). Hence, in an embodiment (at least part of) the extrusionstarting material may include a luminescent material. Therefore, in aspecific embodiment at least part light transmissive part comprises aluminescent material configured to (“wavelength”) convert at least partof the light source light into light of another wavelength. Theluminescent material may be embedded in the light transmissive partand/or may be coated on such part (downstream or upstream thereof)and/or may be provided as foil, etc.

Further, optionally at least part of the multi-channel plate may bewhite or colored. For instance, (at least part of) the extrusionstarting material may include a pigment, such as a white or coloredpigment. Optionally, different parts may include different colors. Alsocombinations of one or more parts with luminescent material and one ormore parts with a white pigment or a colored pigment, etc. may be used.

Further, optionally one or more parts of the multi-channel plate mayinclude an UV blocking material. For instance, when construing ahorticulture construction (see also below) or other assembly, parts mayinclude such UV blocking material, especially parts where light forhorticulture is less relevant.

Further, optionally at least part of the external surface of themulti-channel plate may comprise a coating. This coating may be apigment containing coating and/or a luminescent material containingcoating. Alternatively or additionally, the coating comprises andanti-scratch coating and/or an anti-reflection coating. In anembodiment, the coating may include a luminescent material (see alsoabove). Further, a foil may be provided to at least part of the externalsurface of the multi-channel plate. Such foil may have one or morefunctionalities as describe here before for the coating.

The first channel has an optical function and may include amongst othersone or more light sources. In a specific embodiment the first channelincludes optics integrated with a channel wall, and especially beingpart of a single polymer body. An advantage of extrusion technology isthat such structures may easily be provided during the extrusionprocess. Here, the term “optics” may refer to one or more of a lenses, amicro lenses, a mirror face (e.g. a wall having mirror functionality),and a diffusor. Optionally, the term “optics” may also refer to anoptical filter, as the wall may also include an optical filter, such asby including an absorbing species in (a component) of the extrusionstarting material. Of course, optics may also be provided afterproduction of the multi-channel plate body. Note that though each firstchannel has a lighting function, the lighting function may differ. Alsothe optional optics in first channels may differ between first channels.

The term “light source” may also relate to a plurality of light sources,such as 2-1000 (solid state) LED light sources, though even more lightsources may be available. Hence, the term LED may also refer to aplurality of LEDs. In a specific embodiment, the light source comprisesa solid state LED light source (such as a LED or laser diode). In aspecific embodiment, the light source includes a multi-LED stripconfigured within the first channel. Such LED strip may be included inthe multi-channel plate after extrusion of the body.

In a specific embodiment, the first channel includes a sub-channel witha cross-section smaller than a cross-section of the first channel,configured to host the at least one light emitting part, for example themulti-LED strip. In this way, the light emitting part, for example LEDstrip, may be slided in the sub-channel and may be kept therein. Thedimensions of the sub-channel and the light emitting part are especiallyadapted to each other. The sub-channel may include (again) atransmissive part (see above).

The light source may be associated with any part of the wall(s) of themulti-channel plate. The multi-channel plate may be configured as downlighter and/or as uplighter, and optionally even also (or alternatively)as edge lighter. Together with optional optics, in principle anyconfiguration of the light source is possible to provide the desiredlight and desired light directionality.

In an embodiment the multi-channel plate is characterized in that saidat least one second channel is configured to provide at least oneadditional function different from said first lighting function selectedfrom the group of functions consisting of photovoltaic cell, fluidtransportation means for fluids like fluid-tight tubes or connectors ornozzles, suspension means, electric equipment like electric cables, ICTequipment, detectors/sensors, circuitry, electric power sources,electrical connectors, charge controller, a battery system, and aninverter. The second channel(s) especially do not have a lightingfunction and/or especially do not include a light source. However,optionally one or more second channels may have a lighting function butdo not include a light source. This may be the case when the first lightsource and first channel are configured to provide at least part of thelight source light into a second channel. In such embodiment, the secondchannel may also be used to distribute light and have a lightingfunction. However, especially in embodiments at least one second channeldoes not have a lighting functionality. In general this may imply thatone or more walls of the second channel are transmissive, at least fortransmission of light source light into the second channel and also fortransmission of light source light out of the second channel. The use ofsecond channels to also provide light may allow an (even) betterdistribution of the light and a (more) homogenous lighting from themulti-channel plate.

As indicated above, one or more second channels may be used to transporta fluid like air or water, which may optionally be used for heating orcooling e.g. a room adjacent to the module, or for other applications(like irrigation via openings with optionally nozzles). Additionally oralternatively, one or more second channels may be used for cables, likefor ICT applications and/or for the light source. Further, such one ormore second channels may also be used for mechanical reasons, e.g. tobridge spaces and/or to introduce strength to a module, which may span asubstantial area. Hence, such second channel(s) does not necessarilycomprise light transmissive wall, or walls that are entirelytransmissive for light source light. Hence, in further embodiments, atleast part of the second channel is not transmissive for light. Forinstance, for esthetical reasons one may choose one or more channels notto be transparent or translucent for light source light. In this way,the use of such channel for cables may be hidden for a viewer. Hence,when a plurality of second channels are available, these channels mayprovide different functionalities, respectively.

As indicated above, one or more second channels may be used to hostphotovoltaic cells, commonly referred to as solar cells. Combination ofday-light for illumination while generating electricity is important invarious lighting applications. Hence, an embodiment of the multi-channelplate comprises solar cells provided in its second channel(s) andproviding a conversion of sun-light into electrical current. Suchdevices can be used to power batteries which electric energy can in turnbe used to power electronic devices such as LEDs. Typically, solar cellsare placed on a back plate, and often, the solar cell manufacturermounts a glass cover plate over the assembly to protect the cellsagainst water, moisture and dirt. Solar cells can also be combined withsolar concentrators. Depending on the application solar cells, lightconvertors and solar concentrators can be combined with LEDs to obtaindesired effects in various applications. For example, in horticulture itis relevant to have day-light with excess blue, red and IR light for theplant growth. On the other hand, in day-light illumination it is desiredto supplement the day-light entering a space with adjustable LED lightto reach the desired color temperature. However, for variousapplications such as verandas, conservatories and vertical glazing it isdesired that solar cell assemblies are still transparent to allow thetransmission of day/sunlight. For this purpose, the multi-channel platecomprises a plurality of solar cells into second channels next to firstchannels of the multi-channel plate which do not include a solar cell.The position of solar cells can be various, for example:

-   -   The solar cells can also be positioned such that the        transparency of the assembly is angle depend. This might be        interesting for e.g. roof applications.    -   The solar cells can also be positioned under an angle.    -   The solar cells might also be positioned perpendicular to the        channel plate.    -   In order to decrease the number of solar cells (and thus cost)        part of the wall may be made diffuse reflective. This diffusive        layer is arranged to diffuse at least part of the light and        redirect it to the solar cells in the channel plate.    -   In another embodiment, the channel plate with solar cells might        comprise at least one light redirecting structure. This        structure is arranged to redirect light towards the solar cells        in the channel plate.    -   In order to decrease the area of solar cells (and thus cost) an        optical element might be integrated to focus light on the solar        cell.    -   In order to increase the light harvesting properties of the        system and reduce the surface area of the solar cells (and thus        cost) we suggest that the channel plate comprises a transparent        luminescent material. The luminescent channel plate is        collecting radiation over a large area, converting it by        luminescence and directing the generated radiation via light        outcoupling means (e.g. a diffuse reflector) to a solar cell        positioned in the channel plate.    -   In the same way, part of the multiwall panel may comprise        luminescent material and convert light which is subsequently        directed to a solar cell.    -   Instead of solar cells one can also include solar concentrators.    -   Part of the converted light might also be directed towards the        plants e.g. in a greenhouse in an efficient way and with an        optimized spectrum.    -   It is also be possible to flip the linear solar cells inside a        channel, such that the individual solar cells are always facing        the sun (as much as possible). Step-wise flipping can be done        with small electric actuators.    -   The channel plate with integrated solar cells might also        comprise other electronics such as a charge controller, a        battery system, and an inverter. These components might be        integrated as well in the channel plate itself.

In yet a further aspect, the invention provides a luminaire comprisingthe multi-channel plate as defined herein. Such luminaire may suspendfrom a ceiling, or may be associated to a wall, etc. Such luminaire mayoptionally also include a plurality of multi-channel plates. Themulti-channel plate may provide lighting and the structure of themulti-channel plate may provide mechanical strength to an optionallyrelatively large or extended luminaire. The luminaire may of course alsoinclude a plurality of multi-channel plates.

In yet another aspect, the invention provides a horticultureconstruction including a plurality of multi-channel plates as definedherein, wherein one or more multi-channel plates may especially becomprised by an infrastructure for providing light and optionally one ormore of water and food to a plant included in the horticultureconstruction. As will be further explained below, multi-channel platesmay optionally be connected. Hence, the horticulture structure may makeuse of the channels to heat horticulture, to provide water to thehorticulture, and to provide light to the horticulture. In a simple way(see also below), elements may be connected to a unit or assemblysubstantially consisting of multi-channel plates. For instance, with themulti-channel plates “city farming” may be applied. City farming is anew and innovative technique in horticulture. This cultivation processis developed to increase production on relatively small areas. Due toseveral techniques like multilayer cultivation and the LED modulesand/or light recipes, it is possible to reduce costs, increaseproduction and grow more efficiently. Hence, with the multi-channelplates (small) greenhouses or greenhouse units may be built.

In a specific embodiment of the multi-channel plate of the invention,the multi-channel plates can be arranged as larger unit (see alsoabove). Channels of different multi-channel plates in line with eachother may be e.g. used to transport fluids or to guide cables, etc.Hence, in an embodiment the multi-channel plate is configured to be ableto be connected (with or without connectors (see also below)) to anothermulti-channel plate of the same type.

For such assemblies of multiple multi-channel plates one may furtheroptionally need connectors. Hence, in yet a further aspect the inventionalso provides a kit of parts including a multi-channel plate, especiallya plurality of multi-channel plates, as defined herein, and one or moreconnectors, wherein the one or more connectors are configured to connectinstalled adjacent multi-channel plates to each other. In an embodiment,the term “kit of parts” refers to a package including one or moremulti-channel plates, especially multiple multi-channel plates, such asat least two, and one or more connectors. In yet another embodiment, theterm “kit of parts” may also refer to the installed combination ofmultiple multi-channel plates, such as at least two, and one or moreconnectors, with the connectors connecting the multi-channel plates.

In a specific embodiment, the one or more connectors are configured forproviding a fluid tight connection between a second channel of a firstmulti-channel plate and a (second channel of a) second multi-channelplate. The connectors may thus be used to connect two (or optionallymore) adjacent multi-channel plates, but may in a specific embodimentinclude the functionality to provide a fluid tight connection betweenone or more sets of channels of adjacent multi-channel plates. Note thatit may not be necessary to connect all channels fluid tight. In general,the first channel(s) of adjacent multi-channel plates may notnecessarily be connected fluid tight. In an embodiment, the term “fluidtight” refers to gas tight. In yet another embodiment, the term “fluidtight” refers to liquid tight, especially water tight.

The connectors described above especially are connectors that may beused to connect two (or more) multi-channel plates. However, optionallyand additionally, multi-channel plates may also be connected withmale-female connection parts associated with the multi-channel plates.For instance, the multi-channel plate may include a first end with amale connection part and a second end with a female connection part. Inthis way, multi-channel plates may be connected via male-femaleconnections, whereby a male connection part may be retrieved by a femaleconnection part. Also such connection may in embodiments be configuredto be fluid tight. Hence, in embodiments the multi-channel plateincludes a first end with a male connection part and a second end with afemale connection part, wherein one or more of these parts areconfigured to provide a (fluid tight) connection between (a secondchannel of) a first multi-channel plate and (a second channel of) asecond multi-channel plate.

It is not necessary that the adjacent multi-channel plates are arrangedin line with each other. Optionally, they may be arranged under an angleunequal to 180°. Hence, in a specific embodiment at least one of the oneor more connectors is configured to connect adjacent multi-channelplates under an angle unequal to 180°. Characteristic angle will be 30°,45°, 60°, and 90° as well as the equivalent oblique angles (of theseacute angles).

In yet a further aspect, the invention also provides a method forproducing a multi-channel plate as defined herein, the methodcomprising:

-   a. providing an extrusion starting material;-   b. multi-channel extruding the extrusion starting material into a    multi-channel plate (“body”); and-   c. providing a light source to the multi-channel plate.

The extrusion starting material may e.g. include a molten polymer and/ormonomers that may react to a polymer. Of course, the starting materialmay include further materials like e.g. colorants, preservatives,diffusor particles, etc. Further, the term “extrusion starting material”may thus refer to a mixture of materials. Mixing may optionally also bedone during extrusion, such is via an intermediate inlet in theextruder. The term “extrusion starting material” may also refer to aplurality of such materials, for instance for multi-component extrusion.The result of the first two stages is the body; the result of the laststage is the multi-channel plate, i.e. the body including the lightsource. Note that preceding, and/or intermediate and/or subsequentstages may include in the process, such as an intermediate cooling orheating, sand blasting of a part of the body, etc. Alternatively, theextrusion starting material includes (molten) glass material. Othermethods than extrusion to provide the multi-channel plate may also beused.

Optionally, part of the total number of channels is created afterextrusion. The multi-channel plate may optionally be configured in amulti-stage process, wherein part of the walls (or ribs) are introducedafter extrusion, e.g. by sliding the walls into an extruded hollow body.

In yet a further aspect, the method may also include arranging a firstmulti-channel plate and a second multi-channel plate adjacent to eachother, and configuring at least a second channel of the firstmulti-channel plate and at least a second channel of the secondmulti-channel plate in a fluid tight connection, optionally with theherein described connector(s). Of course, other connections and/orarrangements can be made. This is an example of a specific embodimentwherein one or more second channels may be used to transport a fluid.However, other functionalities may also be included or used, wherein afluid tight connection may not be necessary, and wherein another type ofconnection may be applied.

In yet another embodiment, adjacent light sources may functionally becoupled, e.g. to provide a lighting system. Hence, in a furtherembodiment the light source of the first multi-channel plate iselectrically connected to the light source of the second multi-channelplate. Optionally, the individual light sources, or even subsets of oneor more LEDs within a LED strip, may individually be controlled. Forinstance, one or more of intensity and color of the light of the lightsource(s) can be controlled. For instance, a LED strip may include LEDsconfigured to provide light with different spectral wavelengthdistributions (such as blue, green, yellow, and red (see also above)).

The terms “upstream” and “downstream” relate to an arrangement of itemsor features relative to the propagation of the light from a lightgenerating means (here the especially the light source), whereinrelative to a first position within a beam of light from the lightgenerating means, a second position in the beam of light closer to thelight generating means is “upstream”, and a third position within thebeam of light further away from the light generating means is“downstream”.

The lighting device may be part of or may be applied in e.g. officelighting systems, household application systems, shop lighting systems,home lighting systems, accent lighting systems, spot lighting systems,theater lighting systems, fiber-optics application systems, projectionsystems, self-lit display systems, pixelated display systems, segmenteddisplay systems, warning sign systems, medical lighting applicationsystems, indicator sign systems, decorative lighting systems, portablesystems, automotive applications, green house lighting systems,horticulture lighting, sky lighting, roofing, glazing, veranda lighting,or LCD backlighting, etc.

As indicated above, the lighting unit may be used as backlighting unitin an LCD display device. Hence, the invention provides also a LCDdisplay device comprising the lighting unit as defined herein,configured as backlighting unit. The invention also provides in afurther aspect a liquid crystal display device comprising a backlighting unit, wherein the back lighting unit comprises one or morelighting devices as defined herein.

The term white light herein, is known to the person skilled in the art.It especially relates to light having a correlated color temperature(CCT) between about 2000 and 20000 K, especially 2700-20000 K, forgeneral lighting especially in the range of about 2700 K and 6500 K, andfor backlighting purposes especially in the range of about 7000 K and20000 K, and especially within about 15 SDCM (standard deviation ofcolor matching) from the BBL (black body locus), especially within about10 SDCM from the BBL, even more especially within about 5 SDCM from theBBL.

The term “substantially” herein, such as in “substantially all light” orin “substantially consists”, will be understood by the person skilled inthe art. The term “substantially” may also include embodiments with“entirely”, “completely”, “all”, etc. Hence, in embodiments theadjective substantially may also be removed. Where applicable, the term“substantially” may also relate to 90% or higher, such as 95% or higher,especially 99% or higher, even more especially 99.5% or higher,including 100%. The term “comprise” includes also embodiments whereinthe term “comprises” means “consists of”. The term “and/or” especiallyrelates to one or more of the items mentioned before and after “and/or”.For instance, a phrase “item 1 and/or item 2” and similar phrases mayrelate to one or more of item 1 and item 2. The term “comprising” may inan embodiment refer to “consisting of” but may in another embodimentalso refer to “containing at least the defined species and optionallyone or more other species”.

Furthermore, the terms first, second, third and the like in thedescription and in the claims, are used for distinguishing betweensimilar elements and not necessarily for describing a sequential orchronological order. It is to be understood that the terms so used areinterchangeable under appropriate circumstances and that the embodimentsof the invention described herein are capable of operation in othersequences than described or illustrated herein.

The devices herein are amongst others described during operation. Aswill be clear to the person skilled in the art, the invention is notlimited to methods of operation or devices in operation.

It should be noted that the above-mentioned embodiments illustraterather than limit the invention, and that those skilled in the art willbe able to design many alternative embodiments without departing fromthe scope of the appended claims. In the claims, any reference signsplaced between parentheses shall not be construed as limiting the claim.Use of the verb “to comprise” and its conjugations does not exclude thepresence of elements or steps other than those stated in a claim. Thearticle “a” or “an” preceding an element does not exclude the presenceof a plurality of such elements. The invention may be implemented bymeans of hardware comprising several distinct elements, and by means ofa suitably programmed computer. In the device claim enumerating severalmeans, several of these means may be embodied by one and the same itemof hardware. The mere fact that certain measures are recited in mutuallydifferent dependent claims does not indicate that a combination of thesemeasures cannot be used to advantage.

The invention further applies to a device comprising one or more of thecharacterizing features described in the description and/or shown in theattached drawings. The invention further pertains to a method or processcomprising one or more of the characterizing features described in thedescription and/or shown in the attached drawings.

The various aspects discussed in this patent can be combined in order toprovide additional advantages. Furthermore, some of the features canform the basis for one or more divisional applications.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will now be described, by way of exampleonly, with reference to the accompanying schematic drawings in whichcorresponding reference symbols indicate corresponding parts, and inwhich:

FIG. 1A-1B schematically depict some aspects of the multi-channel plate;

FIGS. 2A-2E schematically depict some aspects and variants of themulti-channel plate;

FIGS. 3A-3C schematically depicts some aspects and variants of a kit orparts, connectors, and other aspects of the multi-channel plate andapplications thereof;

FIG. 4 schematically depicts an embodiment of a horticultureapplication;

FIGS. 5A-5H, 5J-5N, 5P schematically depicts various embodiments ofmulti-channel plates comprising photovoltaic cells, and

FIGS. 6A-6H, 6J-6M schematically depicts various arrangements of lightemitting parts in the multi-channel plate.

The drawings are not necessarily on scale.

DETAILED DESCRIPTION OF THE EMBODIMENTS

FIG. 1A schematically depicts an embodiment of multi-channel plate 100comprising (i) a plurality of parallel arranged channels 1 and (ii) atleast a light source 10 configured to provide light source light 11.Here, by way of example the module includes two layers with differentchannels. Channels including light sources 10 are indicated firstchannels 110; the other channels (not including light sources 10), whichmay have various functionalities, are indicated second channels 120.Here, the first channel 110 includes a light transmissive part 12. Thelight source 10 is configured to provide light source light 11downstream from the light transmissive part 12 and external from thefirst channel 110; the second channel 120 does not including a lightsource 10. The term “downstream” does not necessarily indicate that inuse the light is directed downwards, it only indicates that light isfound downstream from an item or position. Although the channel axes arenot drawn (for the sake of clarity), the channels of the multi-channelplate are arranged parallel in this schematically depicted embodiment(and also in the other drawings). Here the height (h) is the height ofthe two layers.

Here, by way of example a two layer multi-channel plate is depicted.However, also single layer multi-channel plates may be applied (see alsobelow).

Examples of such plates are e.g. the multiwall polycarbonate sheetsSunlite® of Palram. The plates herein, such as from Palram, may forinstance be a “cellular polycarbonate structure”. The plates arelightweight sheets with high impact strength and good thermalinsulation. Further, they can provide high light transmission. They cansubstantially block all UV emission. They can be used for architecturalroofing and glazing, for skylights and sidelights, for conservatories,for covered walkways, for displays, signage and decorations, forindustrial roofing and industrial glazing, for residential roofing andresidential glazing, for covered swimming pools, for horticulturalgreenhouses, etc.

As shown in FIG. 1A the first channel 110 may include optics 20integrated with a channel wall 105 and optionally being part of a single(polymer) body 2. The optics may e.g. have the function to control thebeam width (see the differences in beams). Further, by way example thelight source 10 is depicted (see also FIG. 2A) to include a multi-LEDstrip 15 (see further also below) configured within the first channel110. To this end, the first channel 110 may e.g. include a sub-channel116 with a cross-section smaller than a cross-section of the firstchannel 110, configured to host the multi-LED strip 15 (see also FIG.2A). The channels 110,120 include cavities circumferentially enclosed byone or more channel walls 105. Hence, the multi-channel plate 100 mayalso be indicated as multi-wall module or multi-wall device, ormulti-wall sheet. Reference 22 indicates by way of example anon-transmissive part. The round element in the one but left channel(second channel 120) on the lower row may e.g. represent a cable ortube. In FIG. 1A, schematically the light is drawn in downwarddirections. However, alternatively or additionally, light may also bedirected upwards. Note that light source light 11 is found downstream ofthe light transmissive part(s) 12.

Referring to FIG. 1A, alternatively all lower channels (here the 5channel layer) may include a lighting function, with the upper channels(here the two channel layer) including another function, such as one ormore of tubing, wiring, housing electrical components, etc. In this way,homogeneous lighting may easily be provided, with the electronics“behind” the first channels 110.

FIG. 1B schematically depicts a luminaire 1100, which comprises one ormore multi-channel plates 100.

FIG. 2A schematically depicts in more detail a sub-channel 116 with across-section smaller than a cross-section of the first channel 110,configured to host the multi-LED strip 15. The arrow indicates how theLED strip 15 may be slided into the sub-channel 16. References 151indicate the respective LED light sources.

FIG. 2B schematically depicts embodiments wherein a face, such as afront face 106, is not entirely flat, but may include a recession 107.This may be for several reasons.

For instance, assuming a first channel 110 such recession may preventscratching of the surface of the channel wall or the transmissive part12. Assuming a second channel, such recession 107 may protect extendingelements, such as e.g. an outlet 301. For instance, this outlet may beused as sprinkler or may be used to irrigate horticulture. Optionally,the outlets include nozzles. For instance, openings may be provided inthe multi-channel plate and nozzles may be arranged to these openings.Such nozzles may especially be designed to provide an irrigationfunction or fire extinguishing function. Nozzles may be arranged toopenings after the production of the multi-channel plate body.

FIG. 2C very schematically depicts the multi-channel plate, having afirst face 61/front face 106, and an oppositely arranged second face 66.Faces 62, 63, 64 and 65 indicated edges bridging the front face and thesecond face 66. Note that the term “front face” does not necessarilyimply that all light escapes from this face. It may well be that part ofthe light of the light source(s), or even all light, (also) escapes fromthe edge(s). The distance between the front face 61/106 and the secondface 66 is herein indicated as height (h). The distance between thefaces 62 and 65 is herein indicated as the length (l) and the distancebetween the faces 64 and 63 is herein indicated as width (w). For asingle multi-channel plate 100, in general l>h and l>w, especially l>>hand l>>w. Further, in general the width (w) will be larger than theheight (h).

FIG. 2D schematically depicts that the multi-channel plate 100 mayoptionally (also) include protruding parts 71. This may be used toarrange adjacent multi-channel plates 100 at a distance from each other.For instance, the space between the protruding parts may be filled withan item, like ground and a plant (for horticulture application).

FIG. 2E very schematically depicts a number of applications that may beincluded in the multi-channel plate 100. From left to right a driver isdepicted, a light source with inserted optics 25 (i.e. not extruded),like mirrors, a light source with a extruded dome as optics 20, Fresneloptics as optics 20 obtainable with the extrusion process (twoexamples), an example of a light source without further optics, an emptysecond channel, and a second channel including a cable. Of course, otheroptions may also be possible (see above).

FIG. 3A schematically depicts a kit of parts 50, including at least twomulti-channel plates 100, and by way of example a plurality ofconnectors 200. Here, by way of example a plurality of differentconnectors are depicted, each allowing a different connection, e.g.connecting two multi-channel plates in line with each other or under anangle a, or connecting 3 or 4 multi-channel plates, e.g. under rightangles, and a connector including by way of example an inlet 231 oroutlet, e.g. for introducing or removing a liquid. Connectors mayoptionally also include electrical connections (e.g. to electricallyconnect adjacent light sources).

FIG. 3B schematically depicts a set of two multi-channel plates 100 aand 100 b, which are connected via connector 200. Here, themulti-channel plates are arranges in line.

FIG. 3C very schematically indicates that a connector 200 may be used toprovide a fluid tight connection 241 e.g. only for a limited set ofchannels.

FIG. 4 schematically shows how the multi-channel plates may be assembledto a horticulture construction 2100, including a plurality ofmulti-channel plates which are coupled to each other and form areaswherein a horticulture item such as a plant, etc., can be provided withlight and optionally other features such as water (see references 302indicating water or irrigation). Optionally, part of the light may alsobe directed upwards, to illuminate leaves from below.

FIG. 5A schematically depicts a channel plate 100 which comprises aplurality of photovoltaic cells (solar cells) 501 in second channels 120wherein the channel plate includes at least one first channel 110 whichdoes not include a solar cell and via which the first lighting functioncould be provided.

FIG. 5B schematically depicts a channel plate 100 which comprises solarcells 501 which are positioned such that the transparency of theassembly is angle depend. This might be interesting for, for example,roof applications.

FIG. 5C schematically depicts a channel plate 100 which comprises solarcells 501 which are positioned in angled position with respect to themain surfaces 503 of the multi-channel plate such that the transparencyof the assembly is angle depend as an alternative to the embodiment ofFIG. 5B. This might be interesting for, for example, roof applications.

FIG. 5D schematically depicts a channel plate 100 which comprises solarcells 501 positioned perpendicular to the main surfaces 503 of themulti-channel plate.

FIG. 5E schematically depicts a channel plate 100 which comprises atleast walls (or ribs) 505 which are over at least over a part diffusereflective in order to decrease the number of solar cells 501 (and thuscost). Thereto said walls are provided with a diffusive layer 507 todiffuse at least part of the light and redirect it to the solar cells inthe channel plate.

FIG. 5F schematically depicts a channel plate 100 which comprises atleast one light redirecting structure 509. This structure is arranged toredirect light towards the solar cells 501 in the channel plate.

FIG. 5G schematically depicts a channel plate 100 which comprisesintegrated optical elements 511 to focus light on the solar cell 501 andthus to decrease the area of solar cells.

FIG. 5H and 5J schematically depicts a channel plate 100 which comprisesa transparent luminescent material 513. The luminescent channel plate iscollecting radiation over a large area, converting it by luminescenceand directing the generated radiation via light outcoupling means 515(e.g. a diffuse reflector) to a solar cell 501 positioned in the secondchannel 120 of the channel plate. Thus an increase in light harvestingproperties of the system and a reduction in the surface area of thesolar cells (and thus cost) is attained.

FIG. 5K schematically depicts a channel plate 100 similar to FIG. 5H-J,i.e. in the same way, part of the multiwall panel may compriseluminescent material 513 and convert light which is subsequentlydirected to a solar cell 501 provided on a main surface 503 of themulti-channel plate.

FIG. 5L-M schematically depicts a channel plate 100 which comprisessolar concentrators 502 instead of solar cells.

FIG. 5N schematically depicts a channel plate 100 in which part of theconverted light is directed towards plants 517, for example in agreenhouse, in an efficient way and with an optimized spectrum.

FIG. 5P schematically depicts a channel plate 100 which comprises linearsolar cells 501 inside second channels 120 which can be flipped around alongitudinal axis 519 extending parallel to the length direction ofchannels in such a way that the individual solar cells are always facingthe sun as much as possible. Step-wise flipping can be done with smallelectric actuators (not shown). First channels 110 are in interdigitatedarrangement with the second channels.

FIG. 6A schematically depicts a top view of a multi-channel plate 100which comprises laser diodes 601 as light sources 10 provided atopenings 603 at one end 605 of first channels 110. Light source lightfrom the laser diodes is coupled into a plurality of solid light guides607 that are provided in the first channels essentially over the fulllength 609 of said first channels. The light guides are provided with apattern (see for example FIG. 6G) via which a homogeneous light outputfrom the light guide is obtained over the length of the light guide.Second channels are not shown, but are present behind the first channelsin the direction as shown in FIG. 6A.

FIG. 6B schematically depicts a top view of a channel plate 100 whichcomprises light sources 10 (multi LED strips) in openings 603 at bothends 605 of the first channels 110 in the multi-channel plate. Secondchannels are not shown, but are present behind the first channels in thedirection as shown in FIG. 6B.

FIG. 6C schematically depicts a channel plate 100 which comprises asingle light guide 607 woven through first channels 110 in themulti-channel plate. Second channels 120 are in interdigitatedconfiguration with the first channels.

FIG. 6D schematically depicts a channel plate 100 which comprises a twolight guides 607 woven through first channels 110 in the multi-channelplate. Second channels are not shown, but are present behind the firstchannels in the direction as shown in FIG. 6D.

FIG. 6E schematically depicts a channel plate 100 which comprisesoutcoupling means 611 on the light guides 607 which are positioned suchthat light is mainly extracted in the directions 613 along to mainsurfaces 615 of the multi-channel plate to further improve thehomogeneity of the light emitted by the multi-channel plate.

FIG. 6F schematically depicts a channel plate 100 which comprises lightguides 607 which are partly covered with a light redirection means 617such as a diffuser which is placed in the vicinity mode parallel toadjacent walls 619 such that light is mainly extracted in the directions613 along the main surfaces 615 of the multi-channel plate to furtherimprove the homogeneity of the light emitted by the multi-channel plate.

FIG. 6G schematically depicts a channel plate 100 which comprisesscattering outcoupling means 611 on a light guide 607 such that light isextracted homogeneously along the length 609 of the light guide, i.e.light extraction means comprises a scattering pattern with a gradient.Similar configurations are envisaged for luminescent, reflective,diffractive and refractive patterns.

FIG. 6H schematically depicts a channel plate 100 which comprisessub-channels 621 in the first channels 110 which can be filled with alight source, a light emitting part, a liquid, electrical parts etc.

FIG. 6J schematically depicts channel plates 100 which comprisesexternal connection means 625 for mutual mechanical (and optionally alsoelectrical) connection of multi-channel plates to each other.

FIG. 6K schematically depicts channel plates 100 which comprisesintegrated connection means 623 for mutual mechanical (and optionallyalso electrical) connection of multi-channel plates to each other.

FIG. 6L schematically depicts a channel plate 100 which comprisesadditional optics 627 such as a reflector foil, for example at one sidefor providing only light at one surface.

FIG. 6M schematically depicts a channel plate 100 comprising additionaloptics 627 such as a diffuser foil for providing homogeneous lighting.

Hence, the invention provides in an embodiment a one-piece channel platethat allows for different functions and can integrate them, enabling theuse of very few components. The multi-channel plate at least includes aluminaire optical housing and may integrate functions like optics,mechanics, appearance, electric insolation, packing/fixation of othercomponents and installation. Compartments and structures with (ifnecessary) specific material properties (e.g. transparent, opaque andsolid), dimensions and shapes can be co-extruded (or afterwardsinserted). Further, other components like light engine (e.g. LEDstrip(s)), driver, sensors, can be inserted in the packing/fixationcompartments. The use of LED PCB/strips and other components is madeeasy as channels can be designed to allow for slide insertion andfixation assembly. The main part of the channel plate construction maystay cool (hot and cold channels), i.e. no (substantial) creep of thechannel plate over time.

A wide range of applications may include, next to lighting: mechanical,insulation, optical, esthetical, water/liquid tubing/plumbing, etc.

The multi-channel plate can be used as roof, wall, floor, separator,box, etc., or can be attached to a roof, a wall, a floor, a separator,etc. The channel plate can be rigid by choosing the right geometricalconstruction of the channel walls. Channels can be empty and only have amechanical function, i.e. is to bridge space. The channel plates can beused as an element to make something rigid, to provide a base/foundationto build upon, to support, to bridge, to fill, etc.Elements/shapes/holes can be added to the channel structure tofixate/support/suspend the channel plate and to connect themmechanically to each other.

Further, the multi-channel plate can be used for insulation orisolation, i.e. to block, separate, isolate, protect. Insulation maye.g. include insulation from liquids and/or gases (e.g. waterproof),electrical insulation, thermal insulation, acoustic insulation, etc.

Optical aspects may include blocking light or permitting light to(partially) pass, changing the properties of light, e.g. color,direction and intensity, etc.

The water/liquid tubing/plumbing may e.g. include that some or allchannels are made of materials that are non-permeable/-porous to wateror other liquids and/or gases (e.g. clean air), the channel plate can beused for transporting these. In principle, any channel shape anddiameter as desired can be made. In combination with transporting water,the channel plate can be equipped with components that deliver the waterat the desired place like taps (nozzles) and sprinkling installation forfirefighting, watering plants etc. Alternatively, the channels can beused to host/accommodate existing pipes and tubing system. Channels canbe used as gutter for wires, lines, cables, etc. All kinds of wires canbe inserted, e.g. electrical power cables and data carriers like glassfibers or Ethernet cables. The channel can provide protection andisolation making an extra around the wire to isolate or protectunnecessary.

The channel(s) may also include heating elements. However, the channelalso allows for other types of heating element, for instance electrical(hot wire) and hot water. In the case of hot water, the channel shouldbe of non-leaking/-porous material.

The channel(s) may include sensors. All types of sensors may bepossible, as long as the channel dimensions accommodate for the sensor.

Furthermore, different channels may have different functions. Forinstance, some channels have a mechanical function only (e.g. bridgingspace and providing rigidity) while others have an optical function orfunction as water pipe. Each channel may house differentfunctionalities. Thus, the overall function and dimensions of thedevice/product is not achieved by repeating the same channel. Toaccommodate different function, different channels may have differentshapes, dimensions, materials, mechanical properties and/or opticalproperties.

With the invention, continuation of channels along multiple plates canbe realized by positioning/outlining the plates so that the rightchannels are in line with each other. Connection of channels (parallelwithin the same plate or extension of the channel from one plate toanother between different plates) can be achieved by connection piecesthat can be plugged into/over the channels that need to be connected.Further, one or more channels can be ended, closed or sealed by using aplug or end cap.

A straightforward way to produce the channel plate is by extrusion.Benefits include the easy adaptation of the design by just changing theextrusion mold and/or material. Virtually any size and shape arepossible. The channel structure allows for thin walls to achievemechanical strength. A rigid structure, with impact resistance andwithout sagging/creeping can be provided. Robustness and rigidity can beachieved by the geometry of the channel walls and spaces. Having onecomponent existing of multiple channels next to each other and/ormultiple channels above each other prevents sagging in the direction ofthe channels and perpendicular to the channels. Individual or allcavities may be sealed for life—e.g. waterproof. A wide range ofmaterials with mechanical and optical features is applicable forextrusion; the lighting application only requires that at least onechannel has at least one translucent side. Extra structures and shapes,of different mechanical and optical properties, can be co-extruded onthe inside of the channels and outside of the plate. Adjacent as well asstacked channels can be extruded as one piece (“body”).

Hence, the invention (also) provides applications where light withnon-lighting functions are integrated, such as a horticultureapplication. However, a multi-channel plate can also be used as aluminaire housing or construction alone, with lighting related functionsand/or components integrated in the multi-channel plate (such asmechanical strength, power supply integration, drivers and/or processorsintegration, sensor integration, etc.). The multi-channel plate maycomprise several layers, wherein in the front layer of channels, eachchannel is filled with light emitting elements such as LED strips. Inthis way, the entire light emitting surface without a ‘spacer’ betweenthem. The rear layer of channels can be used for other functions asdescribed in the patent (see also the comments above in relation to FIG.1a ). Further, the multi-channel plate may comprise several layers inwhich one of the layers has a smaller surface area than the other.

The invention claimed is:
 1. A multi-channel plate comprising (i) atleast one first and at least one second parallel arranged channel,wherein the first channel and second channel are part of a singlepolymer body, and wherein one or more channel walls circumvent a channelcavity, and (ii) at least a light source configured to provide lightsource light to said at least first channel, which includes a lighttransmissive part and is configured to provide as a first lightingfunction said light source light downstream from the light transmissivepart and to the exterior from said multi-channel plate, and wherein saidat least one second channel is configured to provide an additionalfunction different from said first lighting function, and saidmulti-channel plate has a height and a width that are each smaller thana length of the multi-channel plate, with the width being at least 4times the height of the plate; wherein the multi-channel plate comprisesone or more first channels having said first lighting functionality andone or more second channels having at least one additional functiondifferent from said first lighting function.
 2. The multi-channel plateaccording to claim 1, wherein the one or more first channels and one ormore second channels form a group that is repeated one or more times inthe multi-channel plate.
 3. The multi-channel plate according to claim1, wherein the first channel includes optics integrated with a channelwall and being part of a single polymer body.
 4. The multi-channel plateaccording to claim 1, wherein the light source includes at least onelight emitting part configured within the first channel, said at leastone light emitting part is at least one of the group consisting of amulti-LED strip, a laser diode, a solid light guide, a patterned solidlight guide, a coating/film of luminescent material, a transparentcoating/film of luminescent material.
 5. The multi-channel plateaccording to claim 4, wherein the first channel includes a sub-channelwith a cross-section smaller than a cross-section of the first channel,configured to host the at least one light emitting part.
 6. Themulti-channel plate according to claim 1, wherein at least part of thesecond channel is not transmissive for light.
 7. The multi-channel plateaccording to claim 1, wherein said at least one second channel isconfigured to provide at least one additional function different fromsaid first lighting function and is selected from the group of functionsconsisting of photovoltaic cell, fluid transportation means for fluidslike fluid-tight tubes or connectors or nozzles, suspension means,electric equipment like electric cables, ICT equipment,detectors/sensors, circuitry, electric power sources, electricalconnectors, charge controller, a battery system, and an inverter.
 8. Ahorticulture construction including a plurality of multi-channel platesaccording to claim 1, wherein one or more second channels provide one ormore of water and food to a plant included in the horticultureconstruction.
 9. A kit of parts including a plurality of multi-channelplates according to claim 1 and one or more connectors, wherein the oneor more connectors are configured to connect installed adjacentmulti-channel plates to each other.
 10. The kit of parts according toclaim 9, wherein the one or more connectors are configured for providinga fluid tight connection between a second channel of a firstmulti-channel plate and a second channel of a second multi-channelplate.
 11. The kit of parts according to claim 9, wherein at least oneof the one or more connectors is configured to connect adjacentmulti-channel plates with an angle between the adjacent multi-channelplates of less than 180°.
 12. A method for producing a multi-channelplate according to claim 1, the method comprising: a. providing anextrusion starting material; b. multi-channel extruding the extrusionstarting material into a multi-channel plate, where the process includesintermediate cooling or heating; and c. providing a light source to themulti-channel plate.
 13. The method of producing a multi-channel plateaccording to claim 12, wherein the extrusion starting material includesglass material.
 14. A multi-channel plate comprising (i) at least onefirst and at least one second parallel arranged channel, wherein thefirst channel and second channel are part of a single polymer body, andwherein one or more channel walls circumvent a channel cavity, and (ii)at least a light source configured to provide light source light to saidat least first channel, which includes a light transmissive part and isconfigured to provide as a first lighting function said light sourcelight downstream from the light transmissive part and to the exteriorfrom said multi-channel plate, and wherein said at least one secondchannel is configured to provide an additional function different fromsaid first lighting function, and said multi-channel plate has a heightand a width that are each smaller than a length of the multi-channelplate, with the width being at least 4 times the height of the plate,and wherein the thickness of the walls varies over one or more of thelength, width, and height of the multi-channel plate.
 15. Themulti-channel plate according to claims 1, wherein at least part of themulti-channel plate includes a luminescent material.